I used to spit in shoes that I sold to rude customers

I know it’s wrong. I was immature and stupid. I really do feel bad about it (even if the other person was in the wrong). I used to work at a shoe store, and if a customer wanted a shoe in the back, and they gave me attitude, I would go to the back and find the shoe. I’d spit in the shoe and rub my saliva all over it. I spread it enough so that the shoe wouldn’t feel wet. I’d go out and give them the shoe, and smile as they immersed their feet in my saliva.